The average distance between the earth and moon is $38.6×{10}^{4}$ km. The minimum separation between the two points on the surface of the moon that can be resolved by a telescope whose objective lens has a diameter of 5 m with $\lambda =6000\stackrel{\circ }{Α}$ is

(a) 5.65 m                     (b) 28.25 m

(c) 11.30 m                    (d) 56.51 m

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